Five books P, Q, R, S and T are placed on a shelf from left to right. P is to the right of R but to the left of Q. T is between R and P. S…

Five books P, Q, R, S and T are placed on a shelf from left to right. P is to the right of R but to the left of Q. T is between R and P. S is at the extreme right. Which book is in the middle?